This blog documents the adventures of Project Surveyors for the "Hidden Collections Initiative for Pennsylvania Small Archival Repositories" as they visit historical societies, museums, historic sites, and other small archival repositories in the five-county Philadelphia area.

That's History is a biweekly radio segment co-produced by the Historical Society of Pennsylvania and WHYY featuring HSP historian Jonathan Zimmerman. Tune in to hear That's History every other Tuesday at 6 p.m. on Newsworks Tonight on WHYY.